Hypodermic syringe.



its. usage.

UNITED STAT-Es reiterated October 27,1903,

PATENT QF-FICE.

" Rliiirn WALSH, or WAS'll'lX-GTON, DISTRICT or COLUMBIA.

HY PQDERMIC S-YRlNiGE.

SPECIFICATION forming part of Letters Patent No. 74:2,762, dated October 27, 1903 Application filed hlnrclr 7. 1903. Serial No. 148.6". (Ho-medal.)

To all whom it may concern:

Be it known that I, RALPH FALSE, :1 resident of \Vnshington city, in' the District of Columbia, have invented a newauduseful Improvement in Hypodermic Syringes, of which the following is a specification.

My invention has to do with syringes designed more particularly for injecting antitoxicserum. Syringes of thiskind of more recent make consist usunlly of a glass cyli-nder, open at its rear end, sealed at its nozzle end, and containing between its sealed nozzle and a piston-like plug located within and movable lengthwise of the cylinder the antitcxic serum. Accompanying the cylinder is a sterilized hollow-glass plunger, corked at its open end and containing the hypodermic needle and its connected rubber tube, by which it may be mounted upon the nozzle of the glass cylinder.

' To use the syringe, the sealed ti pot the glass nozzle of the cylinder is broken 0d, the plunger is uncorked, the needleand its connected rubber tube are removed therefrom, and the tube is fitted upon the nozzle. After this has been done the plunger can be inserted into the cylinder from the rear of the latter, so as to bear upon the piston therein. Pressure upon the plunger will push the piston forward, and consequently eject the fluid contents of the cylinder through to the hypodermic needle. Under this arrangement the operation of getting the syringe ready for use is necessarily somewhat troublesome and tediousand in fitting the parts together there is great liability of infecting the needle by contact with the hand. It is my object to remedy this and to put the syringe in condiprotecting-cap,

tionf0r practically instantaneous use with but the mnnipulat m of a single part. This result I attain by leaving the cylinder-nozzle open, mounting the rubber needle-holdingtube thereon, providing the needle with a and combining with these parts a clip having the dual function of holding the covering-cap in place over the needle and of hermetically closing the rubber tube at a point intermediate between the nozzle and the needle. The moment the grasp of the clip is relaxed it releases both the cap and the rubber tube and the syringe is ready for In the drawings accompanying and form- .ing part of this specification, and to which I will now refer for-s better understanding of the invention, Figure l is a perspective view of a syringe embodying my invention. Fig. 2 is a longitudinal axial section of the same. Fig. 3 is a view of the spring-clip detached.

A is the cylinder, of glass or other suitable material, having a nozzle 0 (which is unsealed) and an open rear end;

B is thelongitudinally-movable piston (of soft rubber or other suitable material) within the cylinder.

C is the glass plunger, bythe forward pressure of which upon the movable piston I the fluid in front of the latter is ejected from the cylinder-nozzle.

D is the tubular hypodermic needle.

E is the rubber connecting tube, .fitting at one end upon the base d of the needle and at the other end upon the nozzle 0. Up to this point the syringe is as it exists to-d'ny when in readiness for use and is not of my invention. '1 "\at I have addedis the needie-cap F and t1 slip G, which latter serves at once to hold the cap tightly in place over the needle and also by gripping and'compressit i'ng the rubber tub-e E to practically seal the contents of the syringe.

The cap F is preferably of length to receive the needle. Itsopen end is adapted to fitupon and make close contact with the tapering rubber-covered base d of the needle, which when the cap is pressed or drawn down upon it acts as a cork or stopper to close the open end of the cap, which latter before being vapplied to the needle is of course sterilized, and around the open end 0 of the cap isau annular radial flange f.

The clip G, which preferably is formed of glass and of a spring sheet metal, has an annular head or against the passage of the liquid contents of Not only have the syringe. the jaws this function, their grip upon the rubber I not limit myself strictly to the structural detube the) keep the head 5; down upon the flange f, so as to hold the asp F tightly in place over the needle and down upon the rubber based thereof, thus pnictienlly sealing the cap. The jaws g are held in their closed 'position by a clamp sleeve bn-nd j, which when pushed forward onto the outwardly and oppositely lluring shanks of the jaws will IO draw the latter together upon the tube E.

In order to put the'syringe in condition for use, all that is needed istodmwthe clamp g" in nxiirection to release the jaws g and permit them to more npnrt. The clip can then be drawn oil and removed, carrying with it the cap I1, thus at once opening the tube E and uncovering the needle D. It can when the services of the syringe are no longer needed be replaced in position with the same in- :o eility.

llavingdeseribed any improvementnnd the manner in which the same is or may be Citb' ried into effect, I state in Conclusion that I do tails hereinb'efune set forth,-sinee manifestly :5 the same canhe \jaried in some particulars l without material departure l'mn'rmy inven tion; but

What. I claim herein as new, and desire to" secure by Letters Patent, is--- The tubular syringe barrel or cylinder, the hypodermic needle and intermediate rubber tnhe connected at. one end to the nozzle of the cylinder 111d at the other end to the base of the needle, in combination with the needlecovering cap, and the removable clip, constructedand adapted substantially :ts descrihedto ene'age and hold theeap in position over the needle-mud also tocompress nndelose the rubber tube, as hereinbefore set forth. 40'

In testimony whenof I have hereunto set my hand this 7th d8) of March, 1903.

Witnesses:

EWELL A. Dxctt, GEO. F. HARELL. 

